iinc

iinc
index
const

Forms iinc = 132 (0x84)

Stack No change

Description The index is an unsigned byte that must be a valid index into the local variables of the current frame (§3.6). The const is a immediate signed byte. The local variable at index must contain an int. The value const is first sign-extended to an int, then the local variable at index is incremented by that amount.

Notes The iinc opcode can be used in conjunction with the wide instruction to access a local variable using a two-byte unsigned index and increment it by a two-byte immediate value.